sync problem between window 7 and linux

hi..iam working on a file server (samba server) which is on centos 5.4.client pc is window xp and 7 both...My document of windows7/xp are mapped with linux server.so data they save in my document is getting saved in home of user's in linux server or in shared directory of user in linux.by changing the location in side property of My document.....Both user has same name and password in both server as well as their own pc..so only authorized user can only access the share of linux.other use cannot..And Sync is Enable.

Now the is problem occurred with in few days...in windows 7 user's pc what ever data they saved in Mydocument,if now we update the any doc or excel file,file in linux server is not getting save properly.in place of update file a 2SD51DF.tmp file is created in server.and in Mydocument it is updated...
some times sync show disconnected.but when connected it get sync but with error of conflict...in snapshot it is shown...conflict shows tmp file which is not exist in mydocument but exist in linux..

Iam not getting sync file..what is the solution....plz help me