Slow Image Downloads with new modem

I installed a new US Robotics v.92 modem in my friends computer (Win98)everything went well in the installation, and it dials up and says its connected at 45,000 bps (that’s where it should be) but when you try to get a web page, it will download the text fairly quickly, but it can take 10 minutes or so to download the pictures (more than a normal 56k). Any ideas will be greatly appreciated.