Default [Q] samsung s duos

Dear all,
I am a newbie. I bought S duos 7562 1 month back, I rooted my device using unlock root pro as rooting through odin was not helping.
Even after trying umpteen no. of times, unable to install CWM recovery through odin.
Cannot rename file either as it is showing failed(in ES explorer)
Is the problem is due to the baseband curently i m in.
please help, phone is very sluggish, want to install CWM for trying custom roms.

Thanks in advance