Go to AR-A and run a report for that 2003 date.   Do you see the deposit?
 
Print a statement using a date prior to the 2003 date and see if you see the depoits.  
 
If the above shows nothing then try the above 2 suggestions with blank dates, using only the customer code as a variable.
 
Laura
 
 
Kristen asked:
"When you look at the credit info screen in AR, I see there is an outstanding invoice in the Out Inv Amt field.  The problem is that this customer paid that invoice back in 2003... Why is this not giving the accurate total of what invoices are outstanding? "