I receive the next error when I try to do an Import and Export Data, from one Data base:
Could not create an instance of the DTS Package

I didn't have this problem until I unistall SQL Server 2000 to install MSDE2000 in my computer, then I install SQL Sever 2000 again and here was where I detected the error, so I uninstall everything and install again SQL Server 2000.
I already installed SP3a and SP4 and the error is still there, I had install and uninstall SQL Server so many times that at this moment I don't have a clue what else I can do.

Thanks for your time and I hope you undestand my English

first of all,my english is very bad.
You have to register dlls dtspkg.dll and dtspump.dll in C:\Archivos de programa\microsoft sql server\tools\binn or C:\program files\microsoft sql server\tools\binn,for this you have to do:
1-On the 'Start' menu, click 'Run'. Type 'cmd' and click 'OK'. This opens a command prompt window.
2-At the command prompt use the 'AT' scheduler command with the follow syntax: AT time /INTERACTIVE cmd.exe
where 'time' is a time value in HH:MM format for a few minutes in the future. For example:
at 16:44 /interactive cmd.exe
At the time specified, a new command prompt window appears
3-Once at the root folder, run regsvr32 by typing the following and pressing 'Enter':
regsvr32 "C:\Archivos de programa\microsoft sql server\tools\binn\dtspkg.dll"
the same with dtspump.dll