I tried the exact same combination : 7.7.7 + IE 9 and it worked perfectly for me.
I saw that you mentioned it worked in few environment and did not work in few, does that mean same application having same URL ( htt://184.108.40.206: 8080/prweb ) is working in one system and not working in other system or is it like you have two environment ( say DEV and UAT ) and it is working fine in DEV and not working in UAT ?,
Also, have you tried clearing browser cache and check it once ?
That's interesting. I would suggest you to get this investigated further by our Global Customer Support Team. Please raise an SR by visiting my support portal and specify this Mesh discussion link over there so that the GCS engineer does not need to ask you the same set of question that we have already discussed here in the mesh posts.
Also edit this post and add the SR number here for our future reference.