Problems starting ST4


My name is Alejandro, and I want to start using the ST4 version of this software. But everytime I run the program, at the moment of choosing one of the designing environments, it shows me the two messages that can be seen in the pictures.

The first message says "Cannot build a persistent object". "Object name: Name Manager". "Clsid may not have been registered correctly".
The second one says: "File can't be opened. Please make sure that the file type and the file version are the correct ones for the application, and you have permission".

After this messages, I can't continue with the program.

Does anybody know how to solve this problem?

If it is helpful, I am using Windows XP SP3.

Thanks in advance.