Howcome enabling alpha blending makes everything invisible?

Howcome whenever I uncomment this line everything becomes invisible?

Code:

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Device.SetRenderState D3DRS_ALPHABLENDENABLE, 1
'Device is a Direct3DDevice8 instance

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I think its making everything totaly transparent, but howcome?

No one can tell with that line of code. Have you set "D3DRS_SRCBLEND" to "D3DBLEND_SRCALPHA", and "D3DRS_DESTBLEND" to "D3DBLEND_INVSRCALPHA"? What are your alpha colors?

The first two are the important ones. It wont work if you dont have them.

Z.