Cash Reciepts applying very slow

[hamzajosh]

We have recently gone live with Great Plains. We are in the process of manually transferring last 2 months data into the system from our old system. When we go to cash reciepts and apply the payments, it takes a long time ( almost 45-60 secs) when we click OK on the "apply sales document" window. If there are more than one invoices to which to apply the payment, it takes a long time when we select the 2nd invoice after the 1st is selected. Is this a common thing with Great Plains or is there any way we can quicken this process? We need to apply almost 800 payments and this will take an awful long time this way. Thanks