vmware new versions

Hi, first of all thanks for this plugin.
I have a problem, I tried to use it with some ESXi servers 5.5, if I try to check the datastores it returns “Server version unavailable” error.

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[root@drakaris check_vmfs_1.4]# ./check_vmfs.sh -C ./check_vmfs.conf -S vmgsa -V datastore1 -w 80 -c 90
CRITICAL – Server version unavailable at ‘https://vmgsa:443/sdk/vimService.wsdl’ at /usr/share/perl5/VMware/VICommon.pm line 545.
===
where check_vmfs.conf have a line with hostname, username and password for the vmware server (vmgsa in the example).

Do you think it’s possibile to update the plugin for working with same on the latest vmware esxi versions?

Another question, this plugin needs virtualcenter or works also with the free version of esxi?

Thanks

Tasslehoff Burrfoot