CHECK_HTTP odd behaviour

[Paul WILLIS PSE 55499]

I'm trying to run a check on a website we have that a) has a stupidly long generated path and b) insists it is available only to certain browers.
If I run /usr/local/nagios/check_http -p 8000 -H some.host.co.uk -u "/sap/bc/webdynpro/sap/hrrcf_a_unreg_job_search?sap-wd-configId=ZUNREG_JOB_SEARCH&sap-ep-themeroot=/sap/public/bc/ur/customerthemes/sap_kp" -A "Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.0.9) Gecko/20061206 Firefox/1.5.0.9" -R fs_QE2_00
it comes back fine and tells me that it can read the string fs_QE2_00 on the page OK. If I put exactly the same command into my command definition file the accompanying service simply goes red with a status definition of null. If I then drop the -A string it will now work, although it now gives the expected 500 error of browser not supported. I have tried simplifying the -A string but the web site requires pretty much all of it else it 500 errors. Has anyone any idea why the Agent string works when check_http  is run directly but not through Nagios?
 
Thanks
 
Paul
 

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