Gamepad Issues

[mzso]

I have two gamepads a speed link sl-6535 and a sl-6543. If I want to use both of them then its impossible to get both of them to vibrate. Its really frustrating. There is a type option in the rumble section. I don't know what it actually suppose to mean. It lets me choose dx1-4. But no matter how I tried couldn't get how to work. I could get one to work or neither or the other one to make the first ones vibrations (wich is ridiculous). Also when I connect both of them the one wich was joy1 becomes joy2 and the new on becomes joy1 so I have to reconfigure some of the buttons.
Is there a way to fix these issues? Or is it possible to use a different plugin?
With psxfin both work so there is nothing wrong with the gamepads. But that one crashes every 5-10 minutes here. At least pcsx crashes much rarely.

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Intel e6750
Sapphire Radeon hd 2600 XT
2 X 1+2 GB Kingmax 800 Mhz
Windows XP Professional SP3