Image Uploading Problem

HI,
I got problem in uploading the image. problem is very wiered but not that much difficult i think so. ok let me explain you what is goin on…

1- Well i install wordpress on my domain http://www.donaldeastwood.com. but problem is this when upload a file through both flash and html system it is uploaded. no problem but image doesnot apear on the post. i saw in my domain then i realize that there is no folder of ‘upload’. i created it and copy all the images on it then i was able to view the images. so i try to find out attachment link but it is so much complex that i coulnt find it properly. but if someone help me to change the path to wp-content to wp-content/upload.
i test on my own server and everything is working properly. but not here on my domain.

2- well my client have macnitosh os system. and he tries to upload the file through flash file system but it give very common problem. “an error occur while uploading file. http error” i tried to put the code in .httacess file that i got from here about secuirty. but still no success but html file uploader is working. Please let me know if you have any solution about it.

Best Regards
Nazeem Sarwar