Oracle Warehouse Builder Design center can't start

i'm using Orcle Database 11g Enreprise edition Release 11.2.0.1.0 64bit, i want to use warehouse builder wich is included in it, but the problem is that i can't open Design center, it gives me the following error.

 application could not start correctly (0xc0000018)

could anyone help me with this, i can't find a solution

I finally find a solution to this problem, when you download oracle database 64bit, the warehouse builder is included with it, but the design center is working only with 32bit computers, i don't know why oracle would do that, so i downloaded oracle warehouse builder standalone, and configure it following the steps in the oracle official tutorial, and now it works prefectly.