Did you install only the patches for the DLCs you have? Any patches without their respective Master would cause a CTD on start.
No, I have the patches for all the DLCs as well as the main patch. If that's what you're saying...
Here is my load order:
Unofficial Oblivion Patch.esp
UOP Vampire Aging & Face Fix.esp
Oblivion Citadel Door Fix.esp
Unofficial Shivering Isles Patch.esp
Knights - Unofficial Patch.esp
DLCOrrery.esp
DLCThievesDen.esp
DLCFrostcrag.esp
DLCHorseArmor.esp
DLCSpellTomes.esp
DLCVileLair.esp
DLCSpellTomes - Unofficial Patch.esp
DLCOrrery - Unofficial Patch.esp
DLCThievesDen - Unofficial Patch - SSSB.esp
DLCThievesDen - Unofficial Patch.esp
DLCHorseArmor - Unofficial Patch.esp
DLCVileLair - Unofficial Patch.esp
DLCFrostcrag - Unofficial Patch.esp
DLCMehrunesRazor.esp
DLCBattlehornCastle.esp
DLCShiveringIsles.esp
Oblivion.esm
Knights.esp
DLCBattlehornCastle - Unofficial Patch.esp
DLCMehrunesRazor - Unofficial Patch.esp