Same problem here, just with premium and dell e1505. The only why my computer will now enter sleep mode, is if I unplug it then press the power button, no matter how I set the "power and sleep button lid settings". It really bugs me because it used to freacking work fine. Grrr
Yea that is sort of what I ended up doing to fix the problem. Only I went about through going into Windows Mediap Player and turning off network sharing of files. As I noticed in the system configuration that that was listed and thenin the task manager that it was running. After turning it of I have been able to enter into sleep mode.