can not open web page on imac

Pls help!
I have an imac & a MacBook, & I am able to open an important work site on the macbook but not on the imac. I cleared everything, cahe etc, under tools & still does not work...I have restarted the computer & browser many, many times...any ideas?
Thx!

You didn't supply us with much info in order to help. All I can suggest for now is to try another browser. Assuming you're using Safari, try using Chrome or Firefox. If the same problem occurs, post back with info regarding your Mac and which version of OS X you're using.

can not open page on imac

Excuse me, I am using version OSX 10.7.4 on BOTH the imac & the macbook.

I tried to open the site; LeadNetPro - System Login on Safari, (I always use Firefox) but still get the same msg, can't find server. But so strange I just tried it again on my macbook & it opens no problem.

This is so bizarre to me.
Thx!

I just tried it on my iMac and it opened OK. It might have been a temporary glitch since you're able to open it with your MacBook.

Opened on my iMac as well. Give it another try on your end.