ESP converter Can't create Morrowind_ob.cnv

I extracted everything i needed to to a temporary folder. Used the ini file and edited what I wanted it to convert. I'm using v0.98 ESP_conv.exe says: "Welcome in Morrowind to Oblivion mod translator v0.98 Parsing Morrowind.esm Parsing Tribunal.esm Parsing Bloodmoon.esm can't create C:\Program Files\Bethesda Softworks\Oblivion\Data\Morrowind_ob.cnv! Press enter..." What the hell am I supposed to do?