Hi

One of my sites is having a problem, when the admin tries to load SITEMAP it throws an Internal server error msg as follows:
"The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@......co.uk and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
"

Can anyone help ID the problem and what needs to be done to resolve...? I'm not very techie and this is a site I host for a friend..

EDIT-UPDATE:
Upon suggestion of my hosting provider who said the sitemap.xml files was empty and hadn't been updated since Nov, I ran the build sitemap option in Jobs. This didn't seem to change anything as still got the error. I left screen for few mins, went back ind hit the sitemap button and for a brief instant it showed a site map but then disappeared back to server error....! very confused...help please...!!!


See below the Environment setup:

# concrete5 Version
5.4.1.1

# concrete5 Packages
Sortable Fancybox Gallery (1.13).

# concrete5 Overrides
None

# Server Software
Apache

# Server API
cgi-fcgi

# PHP Version
5.3.8

# PHP Extensions
bcmath, calendar, cgi-fcgi, Core, ctype, curl, date, dom, ereg, exif, filter, ftp, gd, gettext, hash, iconv, imap, ionCube Loader, json, libxml, mbstring, mcrypt, mysql, mysqli, openssl, pcre, PDO, pdo_mysql, pdo_sqlite, posix, pspell, Reflection, session, SimpleXML, soap, sockets, SPL, SQLite, sqlite3, standard, tokenizer, xml, xmlreader, xmlrpc, xmlwriter, xsl, Zend Guard Loader, zip, zlib.

# PHP Settings
log_errors_max_len - 1024
max_execution_time - 5
max_file_uploads - 20
max_input_nesting_level - 64
max_input_time - 60
memory_limit - 32M
post_max_size - 8M
safe_mode - Off
safe_mode_exec_dir - <i>no value</i>
safe_mode_gid - Off
safe_mode_include_dir - <i>no value</i>
sql.safe_mode - Off
upload_max_filesize - 2M
mysql.max_links - Unlimited
mysql.max_persistent - Unlimited
mysqli.max_links - Unlimited
mysqli.max_persistent - Unlimited
pcre.backtrack_limit - 1000000
pcre.recursion_limit - 100000
session.cache_limiter - nocache
session.gc_maxlifetime - 7200
soap.wsdl_cache_limit - 5
safe_mode_allowed_env_vars - PHP_
safe_mode_protected_env_vars - LD_LIBRARY_PATH