System is SBS (Novell Small Business suite) 6.5 sp 1 a tree with 3 servers:
1. Border Manager 3.8
2. GroupWise (NAT)
3. WEB (NAT - www.kalmanovitz.co.il) - Apache 2, MySQL ver. 4.0.15a, PHP

Every time I'm loading, an under development PHP file, in the IE or
FireFox browsers, I need to press REFRESH (except the first time in a
work session) to see the updated page.

How can I fix it to display every time the last page version without
clicking on the REFRESH button?

Can it be something wrong with the BM server settings?

Please help.