Notes client error with multi sessions

We are using Lotus notes Client 8. Notes Client is installed on XP host PC. This host PC is been accessed by two thin clients from two deference users ids.

while one user is working on notes other person cannot be logged in to Notes email account. we are getting below error message.

“you cannot use the administration program while the Domino Server is running. Either shut down the Domino Server (but keep the file server running) or choose the icon labeled 'Lotus Notes’instead”

Subject: multiple notes

It is impossible to run multiple instances of a eclipse notes client on Win XP machine. You can try to engage both basic clients from separate \data folders and with separate notes.ini config files.Links should look like: c:\notes\nlnotes.exe "=c:\notes\data1\notes1.ini for the first user

and c:\notes\nlnotes.exe "=c:\notes\data2\notes2.ini for the second one.