Frontpage error after modifying .htaccess file

Each time I change some parameters using Cpanel options that will modify the .htaccess file, I get this error message trying to connect myself using Frontpage:

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403 Forbidden

Forbidden You don't have permission to access /_vti_bin/shtml.exe/_vti_rpc on this server. Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request. Apache/1.3.37 Server at sctt.ca Port 80
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The only solution my Web hosting company is offering is the following:

"...Unfortunately FrontPage is not compatible with Linux and this incompatibility reaches its extreme in .htaccess file. You may find a better software for web designing and replace it with this FrontPage..."

Is there a solution to that?