Computer won't sleep when connected to internet

[Annoyed with sleep mode]

I am currently operating Windows Vista Home Premium on a HP Pavilion a6010n.
When I am connected to the internet my computer will not go to into sleep
mode. The display (monitor) will go to sleep after its desired set time, but
the PC will not. I have tried all troubleshooting hints provided by HP and
nothing works. If I am not connected to the internet the sleep function
tends to work perfectly fine.

 

[Annoyed with sleep mode]

Thanks for the advice; however I tried step 5 under "Network adapters".
Under Network adapters there was "Intel(R) PRO/100 VE Network Connection",
that is the device I unchecked Allow this device to wake the computer. Doing
this did not work. Is this the correct thing I am supposed to be doing, or
am I misunderstanding.

 

[Annoyed with sleep mode]

In step 10 of STEP FIVE there are no boxed in red Property to disable.
Please keep trying to help.

 

[Annoyed with sleep mode]

I do have an "Advanced" tab, but the Property listings are different from the
ones shown in the tutorial. The boxed in red Property settings do not even
exist. There are different properties listed with "Value" settings. Thank
you again.

 

[Annoyed with sleep mode]

Does anyone else have any ideas about this problem. Please provide some more
ideas.

Thanks