PS3 Will Not Eject Disc and Game Sunddenly Stops While Playing

I rented Resistance 2 from Hollywood Video ann popped it in my PS3. It started fine then stopped suddenly saying I needed a software update in order to continue. I d/loaded the software and started the game over. I played for about 15 minutes throiugh the start of Level One and the game suddently stopped playing. The red light on the PS3 kept blinking. I manually hit the On/Off button until the light was a solid red and restarted the game. I played for about 5 more minutes and it again suddenly stopped and I repeated the process all over again. But now the unit will nout turn on and I cannot eject my disc.

I NEVER had any problems with any games I got from Hollywood Video and never had amy problems with my PS3 unit itself until now

Any idea what the problem could be?
Do yu think it is the disc?
How do I solve these problems?

Thanks,

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