Delay in Labor Clearence and Visa

Hi All...
I have been offered a Good Job by a reputed organisation in OMAN. So as insisted by them i had submitted the attested certificates  along with the medical reports on december 15th. I had enquired and also still enquiring the visa status with them. I have received one mail that they are still awaiting for the labor clearence.
How long it will take to obtain the labor clearence?
This is the first time for me to have the oppurtunity to go abroad.

Why the clearence is getting delayed??

Thanx in Advance
Saju

I have got job in oman, i have submitted all documents to the company. how many is take to get working visa.

thanks

venkat