Images upload problem

Hi there,

Since a few ago I have a problem when I upload images. If is the first image that I upload it goes perfectly, but after that, they get stacked and never upload. And then, if I disconnect and connect back a few hours later happens the same; first image goes right and then the second one same problem.

I reinstall wp try to upload image directly from the browser but it seems that nothing works.

Any help pls???

Thanks!