sql AVG() function problem.

[Steven]

Hi. I have the following sql statement:
SELECT AVG(grade) FROM tblEvalGrades WHERE SSN='123456789'

I get the following error when trying to output my table
in my datagrid:
ERROR: Decimal byte array constructor requires an array
of length four containing valid decimal bytes

The grades that I have are GPAs. I am using an Access
database, and the field grade is Precision 4, Scale 2,
and Decimal Places 2. Could someone tell me what I need
to do to get rid of the error. Thank you in advance.

Steven