[rt-users] restart apache failled

[nast linux]

Dear All,

After  installing RT-Authen-ExternalAuth I got error while restarting
apache:

[Thu Sep 03 03:36:17 2009] [error] Can't locate Net/LDAP.pm in @INC (@INC
contains: /opt/rt3/bin/../local/lib
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib /opt/rt3/bin/../lib
/etc/perl /usr/local/lib/perl/5.10.0 /usr/local/share/perl/5.10.0
/usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10
/usr/local/lib/site_perl . /etc/apache2) at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm
line 3.\nBEGIN failed--compilation aborted at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth/LDAP.pm
line 3.\nCompilation failed in require at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm
line 26.\nBEGIN failed--compilation aborted at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/Authen/ExternalAuth.pm
line 26.\nCompilation failed in require at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/User_Vendor.pm line
3.\nBEGIN failed--compilation aborted at
/opt/rt3/local/plugins/RT-Authen-ExternalAuth/lib/RT/User_Vendor.pm line
3.\nCompilation failed in require at (eval 161) line 3.\nCompilation failed
in require at /opt/rt3/bin/../lib/RT/Record.pm line 70.\nBEGIN
failed--compilation aborted at /opt/rt3/bin/../lib/RT/Record.pm line
70.\nCompilation failed in require at /opt/rt3/bin/../lib/RT/Attribute.pm
line 72.\nBEGIN failed--compilation aborted at
/opt/rt3/bin/../lib/RT/Attribute.pm line 72.\nCompilation failed in require
at /opt/rt3/bin/../lib/RT/SharedSetting.pm line 67.\nBEGIN
failed--compilation aborted at /opt/rt3/bin/../lib/RT/SharedSetting.pm line
67.\nCompilation failed in require at (eval 105) line 3.\n\t...propagated at
/usr/share/perl/5.10/base.pm line 92.\nBEGIN failed--compilation aborted at
/opt/rt3/bin/../lib/RT/SavedSearch.pm line 69.\nCompilation failed in
require at /opt/rt3/bin/../lib/RT/SavedSearches.pm line 70.\nBEGIN
failed--compilation aborted at /opt/rt3/bin/../lib/RT/SavedSearches.pm line
70.\nCompilation failed in require at
/opt/rt3/bin/../lib/RT/Interface/Web.pm line 68.\nBEGIN failed--compilation
aborted at /opt/rt3/bin/../lib/RT/Interface/Web.pm line 68.\nCompilation
failed in require at /opt/rt3/bin/webmux.pl line 111.\nBEGIN
failed--compilation aborted at /opt/rt3/bin/webmux.pl line 111.\nCompilation
failed in require at (eval 2) line 1.\n
[Thu Sep 03 03:36:17 2009] [error] Can't load Perl file:
/opt/rt3/bin/webmux.pl for server srvrt01:0, exiting...

How to solve this error?

Thanks,
ns
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