Hi,
Well the first thing is to get them hosted somewhere online.
You can put them in your gallery here - this tutorial is a bit old but the basic procedure is the same I think.
And here is another one in video form that might also help.
You can also use a site like http://photobucket.com/
They should also have tutorials to help you.
It is possible they are too large - I think the limit is 2 Mb and gallery space is limited so photobucket often makes more sense for larger pictures. You can also resize them.
If you still have trouble just ask any member of staff and we will do our best to get you sorted.
dr del