[Plugin: W3 Total Cache] Xcache in Dreamhost

Hello,

recently I’ve activated the XCache in my Dreamhost server. Everything was fine until some days ago DH decided to upgrade the XCache to the 1.2.2 version. Inmediatelly, an ugly error starts to be displayed in the web, saying that xcache.var_size is 0 and should be configured. I’ve decide then to going back to the disk mode caches. The problem is that W3 Total Cache, everytime I try to change the object cache or even disable it, generates an error in WP 3.3 and does nothing.

Any idea what is happening? Is there any way that I can change the caches to disk without using the admin panel?

Thanks in advanced.