Rstudio initialization error

The day after i installed r version 3.1.1 and rstudio server I couldn't login any more. The error message i was getting is: "rstudio initialization error error occurred during transmission" .
In syslog the following error shows.

ERROR R SUICIDE: unable to open the base package|||; LOGGED FROM: void {anonymous}::rSuicide(const string&) /home/ubuntu/rstudio/src/cpp/session/SessionMain.cpp:1023