Ah... I tried to attach the coding as a file but I have just realised that the only files I can attach are Jpegs etc . I don't want to have to send you all the code otherwise it would clog up this forum and I don't think that it would make any sense if I just sent you a small amount of the code.
The problem is not so much that the cell won't stretch horizontally but more that it won't stretch vertically. I haven't specified a height for the cell only a width. Yet it won't stretch anymore in the vertical direction.