It would be helpful to supply some information about the error you receive, and of course the IPP version you are using, and the linkage model you are trying to use.
Also, take a look at the following articles, they are helpful:
Please note that, if you are using IPP 7.x and want to follow a static linkage model, you will find a difference in the library file name; it will be tailed by an _t for static linkage with dispatching, an _l for static linkage without dispatching model. (ippcc_t.lib, ippcc_l.lib).
_ippiYUV422ToRGB_8u_C2C3R@24 is included in the ippcc.lib.
Where did you add the libraries in VS2005? The following article may provide some help the configuration:
Also if you are building 32 bit application, it needs to link with 32 bit IPP library, and 64 bit applications need Intel 64 libraries.
Check the Trial or Buy e-mail you got when you opted for the trial or purchased IPP.
It will contain the link for the download. There are ia32, x64 and x3264 installations - you probably want the last one which would install all libraries.