Any factors that Development Components cannot be imported?

Dear all experts,

I am new to Webdynpro development. I have tried to open a webdynpro program developed by other developer before.

1. Copy the source code under my documents and settings, e.g. d:\Documents and Settings\xxx\.dtc\LocalDevelopment\DCs\com.xxx.xxx

2. Select File > Import and then select Development Components and logon my account to server. Supposing the component would be appeared under Local as usual. However, this time, I cannot see the component imported.

May I know do you have any idea for about? Thank you very much!

Best regards,

Anne