creating a view

I'm trying to create a view to check another view for a record that matches to the value in a textbox of a form. It is giving a syntax error.
This is how my SQL looks like

SELECT aql_level, aql_level_info
FROM v_tblPart_cost_info
WHERE cust_part_num = forms!edit_shiping_sched!cust_part_num

Thanks!!What was the error?
Check books online for correct syntax=.