thanks gster, thanks jay
@jay: i have tried this tool before for covering the seams on a model using clone tool before and it worked fine. i am aware of the points that u have mentioned and i have tried those already but like what gster says the uvs should be in 0 to 1 plane.
The uvs for the model which i have mentioned above was in 0 to 1 plane so thats why it worked.
but this time i have modelled a human character with clothes and other acessories on. I uv mapped the head, body, clothes and shoes in seperate uv planes. This i did so that i get a better resolution for the head and body. Even when u save the polygon snapshots u have an option of defining the range area.
another thing that i want to add is that the textures are getting placed properly for the head, body, clothes etc.. Its just the 3d paint tool.