Touchpad tap isn't being responsive...

Hi everyone I'm new into this forum. I don't usually bother with little issues like mine, but this time this is driving me nuts!. I've been trying to search and research over the internet for the past 7 days and I haven't had good luck. And since my warranty period has expired you guys are my last chance :emotion-6:.

See, the problem is related with my Inspiron 1501's touchpad tap function, The laptop originally came with Windows Vista Starter and with 512mb of RAM, But 2 months ago I upgraded the RAM to 2GB in order to fully support and take advantage of Windows 7 Ultimate 32bit.

Since then my touchpad's scroll function stopped working, but I didn't take too much attention until last week. So I thought I'd be some driver related issue and I went to the Dell's drivers download section and couldn't find any drivers for my touchpad using Windows 7 OS so I installed the Vista driver as Dell Support page told me to.

The problem is that the scrolling issue got resolved but, now the tapping function isn't working quite well, single/double-clicking is a pain, it's barely responsive and I've got to tap to click a few times to get it to work.. Yesterday surfing this same forum looking for answers I found a similar issue and it was resolved by installing Windows 7 drivers directly from the manufacturer's website (in this case Synaptics) So I did the same but the issue still persists :emotion-7:

I hope you guys help me out fixing this, thanks in advance and sorry for the bothering :emotion-4: cheers!

Fernando R.