Most of our systems use profibus or mpi to connect to the operator panels, if I connect via Ethernet to the plc I have to integrate protocol in order to access the panel program.
Here is link to Siemens support page where you can find tool that may help solve some problems with CP5511 installed in some of new laptops with Win 2k/XP. http://support.automation.siemens.c...g=en&siteid=cseus&aktprim=0&extranet=standard
(Entry ID: 22662185)
Sometimes it helps. You can find there descriptions of problems and their reasons.