Please help... my Gridview link won't work!

OE Order Detail w/Head table containing field Doc #.

is linked to:

AR Transactions containing field Doc #.

The 2nd view loads but comes up blank! In Field Properties both are called Doc # and neither have a Link Name. The Field Length is 8 in the OE table and 12 in the AR table.

Please help me link these views!!! I really need to get this working.

Thank-you.