pmwiki in sub-folder

Hi Friends,
My original html site had an operational pmwiki installed on a protected sub-directory. I converted the html site to a WordPress site and lost the ability to connect to the pmwiki altogether. If I remove the “protection” on the sub-folder I can connect from the link in the WordPress site, but so can the public and this is private info on the pmwiki. Several things I’ve looked at indicate that this is an issue with the .htaccess files, but there has been no indication of how this is corrected. I would appreciate any info on how to configure this. Thank you.