[Resolved]  Mahindra scorpio M2di — AC not workong properly

Boss the day i purchased my SUV since very first season ie April 2008 m having problem with my car's AC i was being asked to get the gas filled, I got it done but this April2009 again problem is same cooling is not Ok as this time also i was being asked to get the gas filled, but just let me know that do i have to get the gas filled every time in April or is there any permanent solution, as i hav only done my 11000 km only.
let me clear up the thing m having one Maruti Swift and A Alto too but since i bought the cars i never turned up to service station for any problem except routine service ( both are 3.6year old). Now just revert back with some permanent solution.
Thanks,
With Regards,
Manmeet Singh Makkar
[protected] (cell)