^OPM^

been happening for months now and up till now i been blaming crap NTL-but been realising when i am running firefox browser or even internet explorer and i have my zonealarm running sometimes when i open my browser window up it fails to find page-it does this on numerous differant websites-eventually if i keep clicking try again it will find them-but just done a test and if i close down my zonealarm it works first time-so somewhere there in lies a clash between zonealarm and my browsers-i currently run windows XP Pro-any one else getting this problem? and if so solution-looked on help page but nothing on there.