WordPress Causing Apache Server Overload

Hi, can someone please help, My site (wordpress) is blocked by the host provider because it is causing too much load on thier apache server:

within a minute there are almost a hundred connections to attachments, which ties up the apache server. Most of which look like this:
============================================
mysite.com GET /?attachment_id=1442 HTTP/1.1
mysite.com GET /?attachment_id=1442 HTTP/1.1
mysite.com GET /?attachment_id=1442 HTTP/1.1
mysite.com GET /?attachment_id=1328 HTTP/1.1
mysite.com GET /?attachment_id=1328 HTTP/1.1
mysite.com GET /?attachment_id=1442 HTTP/1.1
mysite.com GET /?attachment_id=1288 HTTP/1.1
============================================
Can someone please help me out? ANY SUGGESTIONS?

Thanks.