We had a customer who had an issue setting up multiple EVO and Windows 7. Some of the time, he said, print jobs can get dropped from the que. He said that changing the Print Proccesor in the Advanced Tab of the Printer Properties can eliminate this problem. The default for the EVO will be "LKTXPP". Changing it to "WinPrint" will alleviate the issue.
Please let us know if this works for you as well.
Matt Sargent
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Support Representative
POS-X, Support Division
360-738-8433 x 5