New Haier 7.2V rechargeable NI-MH

Question

new Haier 7.2V rechargeable NI-MH battery pack for a new Haier Portable DVD player was stored in a drawer for 2 years until recently. Attemped to recharge battery pack via electrical outlet. Obtained blinking red and green lights on battery pack but was never able to obtain a charge. DVD player works only when pluged into electrical outlet. Please advise. Thank you.