Honestly, with the price of 56k modems now.. Don't rip your hair out.. I used to work for AOL tech support and it's just not worth the hastle.. Skip McDonalds (no offense inteded, modems are just that inexpensive now) and Go get a new modem.. Here are some links to good quality modems and very affordable prices..
Not to mention, you can walk into almost any local computer store and pick up an internal 56k modem for under $20.
In addition, if you get a new one, then you can call the company that manufactures the board and get professional technical support if, for some reason, it doesn't work..
Believe me.. The money you spend is worth the headache that you save..