flash plugin crashes on AMD64

[Nacho]

Binary package hint: firefox

After installing flashplugin-nonfree it worked normally but soon i'd noticed it stopped working. So I reinstalled and it worked again, and again it stopped working.
After some times repeating the same procedure i realized that whenever i reinstalled the plugin it worked on the first launch of firefox, but if i closed and relaunched the browser then it wont be able to load the plugin.
Following is the error message thrown by firefox
----------8<--------8<----------
LoadPlugin: failed to initialize shared library /home/ivissani/.mozilla/plugins/nppdf.so [/home/ivissani/.mozilla/plugins/nppdf.so: clase ELF errónea: ELFCLASS32]
LoadPlugin: failed to initialize shared library /usr/lib/firefox/plugins/nppdf.so [/usr/lib/firefox/plugins/nppdf.so: clase ELF errónea: ELFCLASS32]
*** NSPlugin Wrapper *** ERROR: failed to initialize plugin-side RPC client connection
----------8<--------8<----------

ProblemType: Bug
Architecture: amd64
Date: Fri Nov 2 00:20:00 2007
DistroRelease: Ubuntu 7.10
NonfreeKernelModules: vmnet vmblock vmmon nvidia
Package: firefox 2.0.0.8+2nobinonly-0ubuntu1
PackageArchitecture: amd64
SourcePackage: firefox
Uname: Linux Rivendel 2.6.22-14-generic #1 SMP Sun Oct 14 21:45:15 GMT 2007 x86_64 GNU/Linux

[Marlon Cisternas Milla (mcisternas-deactivatedaccount)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!