Hi Tezcan,
I am afraid but I was not able to reproduce the issue.
I successfully managed to have my sample run on a computer without any of the Syncfusion assemblies in the GAC as well as the Public Assemblies folder.
I used the assemblies by default copied into the Bin folder during the compile time.
The sample executed successfully, with your palette loaded and also I was able to drag and drop nodes from the Palette to the Diagram successfully.
I am attaching my sample file for your convenience.
Before running the sample do the following:
1. Open the Syncfsuion DashBoard - > Assembly Manager
2. Select Remove all versions
3. Ensure that all of the Syncfusion Assemblies are removed from the GAC ("c:\windows\assembly" folder)
4. Go to the Public Assemblies folder at:
For VS2005:
-----------
C:\Program Files\Microsoft Visual Studio 8\Common7\IDE\PublicAssemblies
For VS2008:
-----------
C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\PublicAssemblies
5. Remove all the references to the Syncfusion Assemblies
6. Now try running the sample by unzipping it and select the solution file (SLN file)
7. Execute it, it runs successfully and also the drag and drop from palette is successful!
Let me know if you shall need any further clarifications in this regard, Thanks!
Happy Coding!
-Ajeet
DWinF_Palette_4a439644.zip