Auto Trans Gasket Leaking

Hi. This evening I was changing the filter and pan seal on my 1982 240d automatic transmission. When I put it all back together and poured the fluid in, it leaked out of the side of the pan pretty fast. I'm sure the seal is on correctly and I did'nt over tighten the bolts. I really need help on this since I wont be able to drive until I fix this. Any help would be very extremly appreciated.

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