Problem Passing Byte-Array to a Class's Property

[Ben321]

The property is defined in the class with this code:

Public Property Let PrivateKey(ByRef Prk() As Byte)

The code in a command button defines an array to pass with this code:

Dim PrKey(39) As Byte

and then passes it to the class's property with this code:

RSA.PrivateKey = PrKey()

What am I doing wrong? Or is this a bug in VB6 itself?