I am having an issue stacking an existing 3750e POE switch with a 3750x stack, the POE switch keeps coming up with version mismatch.
GFM-STACK#sh switch
Switch/Stack Mac Address : a493.4cf7.4080
H/W Current
Switch# Role Mac Address Priority Version State
----------------------------------------------------------
*1 Master a493.4cf7.4080 15 1 Ready
2 Member a493.4cf2.3780 1 1 Ready
3 Member a493.4cc0.da00 1 1 Ready
4 Member 0817.35e7.b800 1 1 Version Mismatch
GFM-STACK# dir
Directory of flash:/
2 drwx 512 Feb 28 1993 19:19:57 -05:00 update
6 -rwx 1096 Sep 26 2013 20:51:58 -04:00 vlan.dat
7 -rwx 3096 Sep 27 2013 09:20:08 -04:00 multiple-fs
8 -rwx 3855 Sep 27 2013 09:20:08 -04:00 private-config.text
9 -rwx 21837 Sep 27 2013 09:20:08 -04:00 config.text
10 drwx 512 Feb 28 1993 19:09:17 -05:00 c3750e-universalk9-mz.122-55.SE3
GFM-STACK#sh lic feature
Feature name Enforcement Evaluation Clear Allowed Enabled
ipservices yes yes yes yes
ipbase yes no yes no
lanbase no no yes no
------------------------------------------------------------------------------------------------------------------------------------------------------------------
POE switch
WP-GFM-PSW1-N#dir
Directory of flash:/
2 -rwx 736 Sep 27 2013 09:24:51 -04:00 vlan.dat
3 -rwx 1937 Sep 27 2013 10:07:43 -04:00 private-config.text
4 -rwx 6975 Sep 27 2013 10:07:43 -04:00 config.text
428 -rwx 14587929 Sep 26 2013 14:11:18 -04:00 c3750e-universalk9-mz.122-55.SE3.bin
429 -rwx 4120 Sep 27 2013 10:07:44 -04:00 multiple-fs
WP-GFM-PSW1-N#sh lic feature
Feature name Enforcement Evaluation Clear Allowed Enabled
advipservices yes no yes no
ipservices yes yes yes no
ipbase no no yes yes
From show license for the POE switches, it appears you have IP Base license and not IP Services. Upgrade the POE switch to IP services and test again.
HTH