Wow you haven't ran a mile from the title of this post!! Thanks for clicking 
Gateway MY1300, WinME, 56k modem will connect to the internet but not transmit any data. It will dial my mobile number no problem, just can't send or recieve any data.
Laptop connects to the same ISP on the same phone line.
Tried different PCI ports
Tried different COM ports
Tried different modems with different PCI/COM ports
Tried disabling COM/Parallel ports in the bios to free up IRQs
Enabled Modem IRQ sharing
Disabled Modem IRQ sharing and tried different settings above
Am at the end of my tether, would have had a sacrificial fire with the thing if it wasn't an important clients computer. Please tell me I'm doing something stupidly simple wrong...why will it connect but not send or recieve any data?

Gateway MY1300, WinME, 56k modem will connect to the internet but not transmit any data. It will dial my mobile number no problem, just can't send or recieve any data.
Laptop connects to the same ISP on the same phone line.
Tried different PCI ports
Tried different COM ports
Tried different modems with different PCI/COM ports
Tried disabling COM/Parallel ports in the bios to free up IRQs
Enabled Modem IRQ sharing
Disabled Modem IRQ sharing and tried different settings above
Am at the end of my tether, would have had a sacrificial fire with the thing if it wasn't an important clients computer. Please tell me I'm doing something stupidly simple wrong...why will it connect but not send or recieve any data?