IE7 and lost connection

Hi, sorry if this is in the wrong place but I keep losing my IE7 connection after 3 page changes and have to exit and start again. IE tells me that I have lost my connection but it is still there. Windows diagnostics tell me that a Firewall is blocking FTP ports. I have re installed CIS twice now, first because I couldn’t update, after the second install I was able to update but the problem with IE7 still exists in spite of not installing comodo firewall the second time round. I have turned off windows firewall but this dosen’t seem to matter. Should I reinstall the comodo firewall. I have a dial up connection.