Images not handled properly

Hi,
I am using image_assist along with tinymce on my website and unfortunately the images are not being handled very well by tinymce. The problem is that sometimes i want to place the images on the right hand side inline with the text rather than on the left or on top of the text. So i select an image using the image_assist plugin for tinymce and then using the insert/edit image set the image alignment to right. However even after I select full html and do a previewor submit, the image either shows on the left hand side or on top of the text rather than inline with the text. I have been facing this problem for a long time now. Please help.

Manuj