Can anybody help me out plugging bullet connectors pairs ?? These are so tight that i cannot manually plug them .. Isthere any other way out to plug these tight things ..

I guess the first thing is to make sure they are the same pair, in terms of diameter.

Once that is confirmed, you can use the pliers to *gently* squeeze the the male one along its surface so that its girth is reduced *a little bit*.  That should allow you to get them in with relative ease.

Caution is urged... if you over do it, they will become too loose, and you will again have to spend time expanding their girth by inserting something like a thin hobby knife blade or a precision/jewellery screw driver (flat head) under each of its strands and pulling them outwards.

It worked... 
Thanks for d hint..
I have another problem :- Can any1 tell me i cud buy transmiiter bag or cases (Pls. refer indian websites) ?? I want to protect the tranmitter from dust , humidity nd heat ... Any1 pls

Just use search...  see the results for the following search for "carrying case", many of them deal with this.

http://www.rcindia.org/search2?search=carrying+case