NEW YORK (CNNMoney.com) -- The Obama administration said Tuesday it is expanding its foreclosure prevention program to cover second mortgages and to direct more troubled borrowers to the Hope for Homeowners program.

Announced with great fanfare in mid-February, the president's $75 billion program has gotten off to a slow start. Loan servicers only recently started taking applications and many delinquent borrowers have complained about being left in the cold because their home values have dropped or they've lost their jobs.

The administration is seeking to address some of the concerns by tweaking the original modification plan, which calls for adjusting eligible borrowers' loans so monthly payments are no more than 31% of pre-tax income.

Servicers covering 75% of the nation's mortgages are now participating in the program, which also allows some homeowners with little or no equity to refinance their mortgages, a senior administration official said Tuesday. Together, the plans are expected to help up to 9 million avoid foreclosure.