seo-url conflicts (SOLVED)

[llegrand]

I have encountered an issue that I am having difficulty fixing.   After a migration to a new server,  the site will not function correctly if the SEO-URL is set to on.   The home page will display properly,  but any attempt to go to any other site page results in a 500 error message.   If the SEO-URL is set to OFF, all functions well.

I have tried running fixes/repairs on the db table: url_aliases.  I tried just emptying the table and re-generating the seo-urls.  I even brought in a fresh table structure from a virgin install, and re-generating.   All of these still will not fix the issue of enabling the seo-url.

So any suggestions or directions to a solution would be appreciated. 

Thanks,
Lee

UPDATED after solving -  the .htaccess  rewrite rules are CASE SENSITIVE!  -  this was an install in a dir and the addition was done in UPPERCASE,  as soon as it was changed to lower case,  all is working correctly.