Error: Cannot establish a connection. Be sure the device is physically connected

hi > > We are developing a smart device application. We are > facing some issues with this. At first instance...device > is connected properly, we are able to access the internet > over the device. Active sync works great. > > For some time , when i deploy the application directly > from VS.NET 2003 it is successfull. > > This works for numerous times. But due to some reason, > may be a event from the smart device is occured which > restarts my computer. After that there is a connection > issue with the device. and throws the error "Error: > Cannot establish a connection. Be sure the device is > physically connected". > > still i am able to access the internet over the device. > Active sync works fine. > After that we try to deploy the application thru the CAB > package it also doesnt works. > > This has happened with 2 devices. > Pls tell me any solution .