Help flex-provider uninstalled


I am using LG Optimus GT540 mobile phone and an android firmware of 2.1. Today while freeing up some space from my internal memory I uninstalled a application named flex-provider 2.1 (the word flex for sure) and now I am facing all sorts of problem on my phone. My giant share of applications are not running, even some built applications are not running as well so as I can't access my messages, phone settings stops unexpectedly. When I tried to connect my phone to my desktop it did not show up in the connected device so I can repair via USB. So can anyone please help me ? Thanks in advance