My user is printing over rdp. Client is x64 Win 7, Server is x 64 2008. When the user logs into RDP and prints the first page it works correctly when they print a second time they get the error: Thunking Spooler APIS from 32 to 64 Process has stopped working. I tried a new printer driver. They are using the HP 2055dn. The driver is the HP2055 Universal Post Script.