I'm trying to upgrade the library using the link from CPAN. But there seem to be some problems with nmake.

What problems? perl -V:make

Is there any other way to incorporate the new libraries?

Yes, but why ignore problem which are only going to persist? A Guide to Installing Modules 

ppm upgrade LWP

[download]

In reply to Re^11: LWP - 500 Internal Error by Anonymous Monk
in thread LWP - 500 Internal Error by oalvi

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