[TYPO3] Ext Manager problems

[Francois Suter]

Hi,

> Error: The extension MD5 sum could not be fetched from
> http://www.opencontent.org/opl.shtmlextensions.md5. Possible reasons:
> network problems, allow_url_fopen is off, curl is not enabled in Install
> tool.
> 
> How can I solve it?

Well, the explanation is in the very text that you are quoting. Either 
you have a network problem, either you need to enable allow_url_fopen in 
your PHP configuration or you need to have curl on the server with the 
PHP curl library. The latter is the better solution, as allow_url_fopen 
may cause some security issues (I'm not sure which actually, but I know 
ISPs are reluctant to enable it).

HTH

-- 

Francois Suter
Cobweb Development Sarl - http://www.cobweb.ch