if you ever use RTV/FIPG/Silicone sealer on a cork gasket, only use a tiny bit so that it sticks to the engine part. if you do use a big bead of it, it WILL act as a lubricant like billy said. infact, there are alot of engines out there that never even came with an oil pan gasket, just FIPG. Toyota doesnt use oil pan gaskets, just black FIPG. however, the gasket kits include the oil pan gasket and everyone feels the need to use it. DONT, youll end up w/ leaks later. a nice solid bead of FIPG is the best oil pan gasket you can have.

i just pulled the bottom end off a DSM last night and it had a paper gasket on it. as soon as i had all but 3 bolts removd, the oil pan had separated and was hanging down. ive NEVER had an oil pan do that. they were always stuck to the engine w/ a nice seal to some degree. ive never seen an oil pan just DROP off the motor when the bolts were removed.

RTV/FIPG/silicone or gasket, not both. a few dabs to hold the gasket in place could help, as previously mentioned... just not a whole bead.