Printing and Win2k3 Domain

We have a Win2k3 domain, with vista clients. The clients take IP from the DHCP server. Also there is a print server, with 6 printers installed. I have the following problem. Sometimes, some clients, cannot print. The printers are shared correctly, and the printer server is configured correctly. But sometime,s we get an error code of 0x00008ca when trying to print. Could someone explain me the reason we get this error?