Obviously it's hard to answer your question definitely but I don't think you're taxes would be dischargeable in bankruptcy. Let me explain why. One of the key dischargeability factors is that the return must have been due within 3 years (including extensions) of the petition filing. A 2001 return was due April 15, 2002. So those liabilities wouldn't be dischargeable (under this rule) until at least April 15, 2005 which is actually after your bankruptcy filing.
If you're disabled and on SSDI you should contact the IRS and request hardship status. That shouldin't be too hard. Good Luck.