Timeout Expired Error ..

VB Code:
Public Overloads Function ExecuteStoredProcedure(ByVal page As Integer, ByVal pageSize As Integer, _
                                                         ByRef recordCount As Long, ByVal connection As System.Data.SqlClient.SqlConnection, ByVal storedProcedureName As String, _
                                                         ByRef returnObject As DataSet, ByVal sqlParameters() As SqlParameter, _
                                                         Optional ByVal includeReturnValue As Boolean = True, _
                                                         Optional ByVal mustCloseConnection As Boolean = False) As Hashtable
            Dim i, j As Int16
            Dim dataAdapter As New System.Data.SqlClient.SqlDataAdapter
            Dim returnValues As New Hashtable(New CaseInsensitiveHashCodeProvider, New CaseInsensitiveComparer)
 
            Try
                OpenConnection(connection)
 
                Dim command As New System.Data.SqlClient.SqlCommand(storedProcedureName, connection)
 
                [B]command.CommandTimeout = 0                [/B]
                command.CommandType = CommandType.StoredProcedure
 
                If Not (sqlParameters Is Nothing) Then
                    For i = 0 To CType(sqlParameters.Length - 1, Short)
                        command.Parameters.Add(sqlParameters(i))
                    Next
                End If
 
                If includeReturnValue Then
                    Dim returnValue As New SqlParameter("@RETURN_VALUE", SqlDbType.BigInt)
                    returnValue.Direction = ParameterDirection.ReturnValue
                    command.Parameters.Add(returnValue)
                End If
 
                dataAdapter.SelectCommand = command
 
                If TypeName(returnObject).ToUpper = ("DataSet").ToUpper Then
                    recordCount = dataAdapter.Fill(CType(returnObject, DataSet), pageSize * (page - 1), pageSize, dataAdapter.DefaultSourceTableName)
                    If CType(returnObject, DataSet).Tables(0).Rows.Count = 0 Then
                        recordCount = 0
                    Else
                        recordCount = CLng(CType(returnObject, DataSet).Tables(0).Rows(0)("Paging_Rec_Cnt").ToString)
                    End If
                    returnValues.Add("dataAdapter", dataAdapter)
                Else
                    command.ExecuteNonQuery()
                    returnObject = Nothing
                End If
 
                returnValues.Add("Error", 0)
 
                If includeReturnValue Then returnValues.Add("@RETURN_VALUE", command.Parameters("@RETURN_VALUE").Value)
 
                Dim sqlParameter As SqlParameter
 
                For Each sqlParameter In command.Parameters
                    If sqlParameter.Direction = ParameterDirection.InputOutput Or sqlParameter.Direction = ParameterDirection.Output Then
                        returnValues.Add(sqlParameter.ParameterName.ToString, sqlParameter.Value)
                    End If
                Next
 
                command.Dispose()
                Return (returnValues)
 
            Catch sqlex As SqlException
 
                returnValues.Add("Error", -1)
                LogException(sqlex)
                Return (returnValues)
                Throw sqlex
            Catch ex As Exception
 
                returnValues.Add("Error", -1)
                LogException(ex)
                Return (returnValues)
                Throw ex
            Finally
                dataAdapter.Dispose()
                If mustCloseConnection Then CloseConnection(connection)
            End Try
        End Function
This is one of the methods in my Data Access Component. It works fine if I remove the CommandTimeout = 0 Line, however, if I do not, then it gives me "Timeout Expired" error even though it is suppose to wait forever for server to return with the data ?? Anybody knows whats going on here ??