Macbook doesn't wake up after automatic sleep

Question

I've got a problem with my macbook. Whenever it goes asleep from not using it ( automatic, I set the time at 15 minutes ) I need to push the power button for like 2 minutes before it wakes up again. I've many friends who have macbooks, whenever they shut the computer down just by pushing the screen down on the keyboard, they simply need to open it again and it wakes up. Mine doesn't unless I close it and open it 2 minutes later. If I let it shut for something like 10 minutes I then need to press the Power button to have it revive. Sometime I need to press it 2 minutes, sometime a bit less.
That was the first part of the problem. At the beginning it didnt disturb me that much so I didn't try to solve the problem. Now the infaction has mutated. Whenever I put it asleep myself or when it goes automatically I can't restart it. I press the power button but whenever it restarts ( still need to push the power button for 2 minutes ) the screen recovers ( can see the recovering bar down ) and when it reaches the 3 last bar it stops, and an message comes on the front saying there is a problem and I need to restart the computer.
It's very nasty, I can't put my computer asleep, and can do nothing about it.
Has anyone encountered the same problem? Or does anyone know what I can do? I still have my warranty. Should I send it to apple?
Thank you very much for your help.
Here is my system configuration
Model: MacBook5,1, BootROM MB51.0073.B06, 2 processors, Intel Core 2 Duo, 2.4 GHz, 4 GB
Graphics: kHW_NVidiaGeForce9400MItem, NVIDIA GeForce 9400M, sppcipcidevice, 256 MB
Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz
AirPort: spairportwireless_card_type_airportextreme (0x14E4, 0x8D), Broadcom BCM43xx 1.0 (4.170.83.15)
Bluetooth: Version 2.1.1f10, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Serial ATA Device: TOSHIBA MK2553GSX, 232.89 GB
Serial ATA Device: HL-DT-ST DVDRW GS21N
USB Device: Built-in iSight, (null) mA
USB Device: Apple Internal Keyboard / Trackpad, (null) mA
USB Device: IR Receiver, (null) mA
USB Device: BRCM2046 Hub, (null) mA
USB Device: Bluetooth USB Host Controller, (null) mA
And here the problem detail ( message I get when restarting the macbook ).
Mon May 17 19:42:43 2010
panic(cpu 0 caller 0x001A9C5C): Kernel trap at 0x006bac70, type 14=page fault, registers:
CR0: 0x8001003b, CR2: 0x56a11f4c, CR3: 0x018d8000, CR4: 0x00000660
EAX: 0x65417618, EBX: 0x06f860c8, ECX: 0x56a11f4c, EDX: 0x00000000
CR2: 0x56a11f4c, EBP: 0x65417478, ESI: 0xf00a8f4d, EDI: 0x00000000
EFL: 0x00010046, EIP: 0x006bac70, CS: 0x00000008, DS: 0x06f80010
Error code: 0x00000000
Backtrace (CPU 0), Frame : Return Address (4 potential args on stack)
0x65417248 : 0x12b4c9 (0x45aaac 0x6541727c 0x1335ba 0x0)
0x65417298 : 0x1a9c5c (0x464070 0x6bac70 0xe 0x463820)
0x65417378 : 0x1a026d (0x65417390 0x73 0x65417478 0x6bac70)
0x65417388 : 0x6bac70 (0xe 0x6f80048 0x65410010 0x420010)
0x65417478 : 0x6b7269 (0x0 0xf00a8f4c 0x0 0x8)
0x654174e8 : 0x6bf870 (0x6c813c0 0x0 0xf00a8f4c 0x0)
0x65417548 : 0x6bf9e2 (0x6cb7140 0x0 0x65417618 0x0)
0x654175b8 : 0x6bfb30 (0x0 0x0 0x4 0x6b0257)
0x65417638 : 0x6bc0d2 (0x6cb7140 0x711018c 0x4 0x1)
0x65417678 : 0x6b8ebb (0x84e6c08 0x6cb7140 0x654176ac 0xf)
0x654176c8 : 0x6bf3f6 (0x84e6d88 0x84e6c08 0x243bf00 0x243bd7c)
0x65417718 : 0x6bee33 (0x84e6d88 0x84e6c08 0x65417748 0x6c93700)
0x65417778 : 0x6c42f0 (0x70 0x84e6d88 0x84e6c08 0x6c1d47)
0x654177c8 : 0x6c2404 (0x84e6c08 0x6c93700 0x0 0x1)
0x65417828 : 0x6bd569 (0x84e6c08 0x70b4980 0x0 0x6bcecf)
0x65417878 : 0x6b9145 (0x84e6c08 0x3 0x6ced6a0 0x50baa834)
Backtrace continues...
Kernel loadable modules in backtrace (with dependencies):
com.apple.driver.AppleACPIPlatform(1.2.1)@0x697000->0x6d4fff
dependency: com.apple.iokit.IOPCIFamily(2.5)@0x5f4000
dependency: com.apple.iokit.IOACPIFamily(1.2.0)@0x5ce000
BSD process name corresponding to current thread: kernel_task
Mac OS version:
9F2088
Kernel version:
Darwin Kernel Version 9.5.1: Fri Sep 19 16:19:24 PDT 2008; root:xnu-1228.8.30~1/RELEASE_I386
System model name: MacBook5,1 (Mac-F42D89C8)
Thanks for the help

Answer 1

try these troubleshooting steps:
_*resetting the System Management Controller SMC*_
_*resetting your Mac's PRAM and NVRAM*_
if that doesn't help, try booting into _*safe mode*_, then reboot normally.
JGG