I only could understand part of your question.
Your work visa is issued in July 2010, and was valid till end of january 2011. It means that you could enter Qatar any time within this period, between July 2010 and january 2011.
It looks like you entered Qatar somewhere end of October - beginning of November.
Now, once you entered Qatar, previous validity of work visa is expired, and new stamp of entry is stamped in your passport, which is valid for 3 months. It means you had to issue your RP within these 3 months.
After that I got lost. have you finished your RP? If you leave Qatar without finalizing your RP, you either have to get re-entry visa, or the company will have to issue a new work visa for you.