can you tell us what version of ColdFusion is running on the new server? You can get this by putting this code in a .CFM file and then executing it:
<cfdump var="#server#">
Do you know what version your old server was using? If the new server is running an old version (pre v9) of CF, you won't have the ability to set the datasource via "this.datasource" - the error message indicates that "datasource" is a required attribute, which makes me think that this might be your problem.
Also, can you show is the first dozen lines or so of your index.cfm file? I see that others were zeroing in on the DSP_xxx files, but to me the stack dump looks like it is processing your index.cfm file.
-reed