modems on one drive not on other drive

[mellow322]

help
I have a compaq 501OUS pent 3 win ME. I have a 2 gig hardrive I have no problem going on line, when I took my 2gig hardrive out and put a 40gig hardrive in my moden wont respond, I have reinstall the modem(US Robotics PCI Faxmodem includes V.92 and V.90 ITU standard technologies) physycly took it out and reinstall it,removed it installed it again,checked device manager no yellow marks and it says the device is working properly,the only difference I see is if you go to contol panel,modem diagnostic, when the 2 gig hardrive is in(the one that works) it says modem # 1 on com # 1,modem #2(its just one modem) on com #2,when I put the other hardrive(40gig) in it says modem # 1 on com #1 but the other one theres no port,I can't change ports it wont give me that option when Im installing it on the 40gig hardrive. I have tried reinstalling the drivers on the 2nd(40gig) hardrive but it says the best drivers are already installed Can anybody help.