ICMP being dropped between Global Crossings and Onvoy

I have a network (AS33234) I am trying to support that is
downstream from 
Onvoy on one of their connections.  Our monitoring equipment
is located in 
AS4452.  Our monitoring system is not able to ping their
network through 
Onvoy.  The block seems to be happening at either Global
Crossings or Onvoy.  
We are able to reach them using any protocol other than an
ICMP ping (We are 
able to traceroute).  Does anyone else know about or see a
similar block 
going on.  I have attached part of a traceroute.

 2 suwC6.gig3-1-4.qualitytech.com (216.154.207.145) [AS
20141] 0 msec 0 msec 4 
msec
  3 suw04-gig1-0-0.qualitytech.com (216.154.207.173) [AS
20141] 0 msec 0 msec 
0 msec
  4 gig6-2.suwangaeq01w.cr.deltacom.net (66.35.174.165) [AS
6983] 4 msec 0 
msec 0 msec
  5  *  *  * 
  6 pos5-0.atlngapk22w.cr.deltacom.net (66.35.174.101) [AS
6983] 0 msec 4 msec 
0 msec
  7 so-0-0-0.ar3.DAL1.gblx.net (64.208.169.141) [AS 3549] 4
msec 4 msec 4 msec
  8 so1-0-0-622M.ar2.MIN1.gblx.net (67.17.71.34) [AS 3549]
44 msec 44 msec 44 
msec
  9
WBS-CONNECT-LLC-Minneapolis.ge-2-3-0.409.ar2.MIN1.gblx.net
(64.215.81.82) 
[AS 3549] 44 msec 44 msec 44 msec
 10  *  *  * 
 11  *  *  * 
 12 WikstromTel-7003.onvoy.net (137.192.32.30) [AS 5006] 52
msec 52 msec 56 
msec

-- 
Brian Raaen
Network Engineer
braaenzcorum.com