I've got a Dell Inspiron 600m. A friend gave me his old docking station (Dell 2U444/PRO1X). He said he did not have the power supply, but my Inspiron PS should work fine.

I tried using my PS (the original one that came with the unit), but got an error message saying my PS is not powerful enough to run the docking station and my laptop.

So, do I need a different PS and if so, which one?