Standby mode is not working.. My problem is the stand by mode in my laptop. I tried many times to

Question

My problem is the stand by mode in my laptop. I tried many times to usethe stand by mode when my computer is not in use. Before it was workingand i didn't experience any problem. This only happened a couple ofmonths ago. When i clicked the standby mode button, the ''preparing tostand by'' appears in the window. And I waited for how many hoursexpecting it may work but it didn't. The ''preparing to stand by isalways there. So i have no choice but to press the power button in mcomputer so it will turn off, and i will start again. It really bothersme because every time my laptop is not plug after a few minutes''preparing to standby'' appears.. Hope you can help me with this problem. I really wanted my standby mode to work. So please help me.. Thank you guys..