I am running into an error when I try to execute my sql code when I try to find a Section by the CourseNumber and the SectionNumber. It says I have a datatype mismatch in my SQL criteria.

Problems with query/update : [Microsoft][ODBC Microsoft Access Driver] Data type mismatch in criteria expression.
Here is my SQL code that I am trying to use to get information from an access database.

Code:
String sql = "SELECT * FROM SECTIONS WHERE course_number= '" + s.getCourseNum()+"' AND section_number=" + s.getSectionNum();
Here is the method that I wrote.

Code:
	public Section findSectionByCourNumSectNum(Section s) throws SectionException
	{
		String sql = "SELECT * FROM SECTIONS WHERE course_number= '" + s.getCourseNum()+"' AND section_number=" + s.getSectionNum();
		System.out.println(sql);
		Section foundSection = new Section();
		try
		{
			System.out.println("Before creating statement object.");
		    Statement stmt = conn.createStatement();
		    
		    System.out.println("Before creating ResultSet using the stmt to execute the SQL code.");
		    ResultSet rs = stmt.executeQuery(sql); 
		    System.out.println("After creating ResultSet using the stmt to execute the SQL code.");
		    
		    if(rs.next())
		    {
		    	
		    	foundSection.setDatabaseID(rs.getInt(1));
		    	System.out.println("Found Section DatabaseID: "+ foundSection.getDatabaseID() );
		    	
		    	foundSection.setCourseNum(rs.getString(2));
		    	System.out.println("Found Section CourseNum: " + foundSection.getCourseNum());
		    	
		    	foundSection.setSectionNum(rs.getInt(3));
		    	System.out.println("Found Section SectionNum: " + foundSection.getSectionNum());
		    	
		    	foundSection.setInstructorID(rs.getString(4));
		    	System.out.println("Found Section InstructorID: " + foundSection.getInstrutorID() );
		    	
		    	foundSection.setDays(rs.getString(5));
		    	System.out.println("Found Section Days: " + foundSection.getDays());

				foundSection.setBeginTime(rs.getInt(6));
		    	System.out.println("Found Section BeginTime: " + foundSection.getBeginTime() );
		    	
		    	foundSection.setEndTime(rs.getInt(7));
		    	System.out.println("Found Section EndTime: " + foundSection.getEndTime() );

				Calendar cal = new GregorianCalendar();
				cal.setTimeInMillis(rs.getLong(8));
				foundSection.setStartDate(cal);
		    	System.out.println("Found Section StartDate: " + foundSection.getStartDate().getTime());
		    	
		    	cal.clear();
		    	cal.setTimeInMillis(rs.getLong(9));
				foundSection.setEndDate(cal);
		    	System.out.println("Found Section EndDate: " + foundSection.getEndDate().getTime());

		    	foundSection.setRoomNum(rs.getString(10));
		    	System.out.println("Found Section Room Number: " + foundSection.getRoomNum());
		    	
   			    return foundSection;
   			}
		    else
		    {
		    	return null;
		    }
		    
		}//end try
		catch(SQLException sqe)
		{
		  throw new SectionException(sqe.getMessage());
		}//end catch
	}
I have been looking at this for about an hour and just cant see what I am doing wrong. My code is quitting when I try to execute my SQL Code which leads me to believe that I have a problem with my code. Any suggestions... If you need to see the full program or where I am calling the method that I wrote, post and I will zip it or post it and let you see it.