Loading graphics into a post

Hiya,

Every time I attempt to upload a photo into one of my posts…when I get to the last step of this process, when Word Press is actually going to put the photo on the post…it freezes up and no matter how long I leave the now blank pop-up window it will not post to the site. Frustrating! The pop-up window will allow me to shut it down…and all goes back to normal except that the photo has not been transferred to the post. Please help!

Thanks in advance,

Steve