dbassist出错？

I install oracle8.1.7 on red hat 7.1 ,and installed the patch glibc-2.1.3-stubs.tar.gz.
But when I run dbassist ,it shows the next error message:
[oracle@freeradius 8.1.7]$ dbassist
libnldapj8.so: cannot open shared object file: No such file or directory (libnldapj8.so)
java.lang.UnsatisfiedLinkError: no nldapj8 in shared library path
at java.lang.Error.<init>(Compiled Code)
at java.lang.LinkageError.<init>(Compiled Code)
at java.lang.UnsatisfiedLinkError.<init>(Compiled Code)
at java.lang.Runtime.loadLibrary(Compiled Code)
at java.lang.System.loadLibrary(Compiled Code)
at
at oracle.net.config.DirectoryService.getNNFLWrapperQBF(Compiled Code)
at oracle.net.config.DirectoryService.getNNFLWrapper(Compiled Code)
at oracle.net.config.DirectoryService.bind(Compiled Code)
at oracle.net.config.Config.bind(Compiled Code)
at NetConfig.isAutoAuthPossible(Compiled Code)
at CheckerClass_base.DetectDirService(Compiled Code)
at CheckerClass.detectOracleProducts(Compiled Code)
at CheckerClass.DetectAll(Compiled Code)
at DBConfigInfo_base.<init>(Compiled Code)
at DBConfigInfo.<init>(Compiled Code)
at DBCreateWizard.<init>(Compiled Code)
at DBCreateWizard.main(Compiled Code)
then it stoped.
what should I do, I have tried to use sun jdk122 and IBM jdk1.1.8, but nothing is different.
Any suggestion is welcome.