Please ensure your hosting server is configured with the following.

PHP 5.3.17+
MySql 5.0.4 (InnoDB support required)+
Joomla 2.5.x or 3.x

Iconv Support
Mbstring Support
CURL Support
SOAP Support
PHP Directives
GD Library
MSSQL Support
SimpleXML Support

PHP.INI Configuration Settings
Mssql.secure_connection = On
display_errors = Off
upload_max_filesize = 5M

Suggested for performance:
max_execution_time = 300
memory_limit = 128M
post_max_size = 5M
max_input_vars = 5000

Note: Joomla requires mod_mysql, mod_xml, and mod_zlib, and magic quotes off for Joomla installations on Apache. These are required for JoomConnect as well. Joomla also supports Nginx and Microsoft IIS, comparable functionality would be required.