eMags created with eMagStudio rely on advanced flash-in-flash loading and can therefore be impacted by certain server-specific settings. One of these is the gzip option of many servers, which conflicts with most advanced Flash content and can cause eMags to stall during the loading process. 

Turning off gzip for Flash is entirely unproblematic, and is in fact the correct setting as Flash has no benefits at all from this feature. Please refer to this tutorial for instructions on disabling gzip.