|I've never heard of the software, and you never named the dll in question.|
If it's a commercial product, I would suggest contacting the publisher / developer and get support for them. If this was a commercial product, and the company is out of business, then I would see if there's still some community support for the product. If there is and this is a bug in the software (vs. some configuration issue in your environment), chances are good someone else has experienced the problem and has a valid fix or workaround.
Also, you shouldn't be looking for 64-bit dlls unless this product is 64-bit software. It probably isn't if it's from the year 2003.
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