After mldonkey is installed, the sancho GUI cannot be installed.

After mldonkey is installed, the graphic interface sancho-general Linux technology-Linux technology and application information cannot be installed. For details, refer to the following section. Follow this post to install
Http://www.imxxb.com/2008/01/mldonkey-sancho.html
Go to "3. sancho Settings"
Run sancho on the terminal. The result shows:
Unhandled Java exception:
Java. lang. UnsatisfiedLinkError: no swt-pi-gtk-3509 or swt-pi-gtk in swt. library. path, java. library. path or the jar file
At org. eclipse. swt. internal. Library. loadLibrary (sancho)
At org. eclipse. swt. internal. Library. loadLibrary (sancho)
At org. eclipse. swt. internal. gtk. OS. (Sancho)
At java. lang. Class. initializeClass (sancho)
At org. eclipse. swt. internal. gtk. OS. g_utf16_to_utf8 (sancho)
At org. eclipse. swt. internal. Converter. wcsToMbcs (sancho)
At org. eclipse. swt. widgets. Display. (Sancho)
At java. lang. Class. initializeClass (sancho)
At org. eclipse. swt. widgets. Display. setAppName (sancho)
At sancho. core. Sancho. main (sancho)
What's going on ???
I found it in Google. It's all in English and I don't quite understand it. Seems to be lack of swt-pi-gtk-3509, it also seems to be related to 64-bit systems (I use Fedora10x86_64), but also related to eclipse. When? Where are swt. library. path, java. library. path or the jar file?
In Google, this problem is also encountered by others, but it is only in English and cannot be understood.

Please help me a lot