Which ITR form to be used

I am Ravichandran working in pvt. concern.  For Assessment Year 2009-10, I used  ITR - 2  as I had some short term capital gain on purchase and sale of share.  But for the year 2010-10,  I have only loses through share.  Show I dont want to show the losses in the IT return during this year.   May I use ITR - 1 as I do not have any short term capital gains or  I have to use ITR-2 form only as I have used it in the last IT return filing.   Please clarify.

Thanks for your reply.  Regards.