Concurrent requests

Hi, 

we using version 1.4, we trying to get the report by this steps:

1) build report:

{
"reportDescription": {
"reportSuiteID": {{suite id}},
"dateFrom": {{date}},
"dateTo": {{date}},
"dateGranularity": "day",
"segments": [
{
"id": {{id}}
}
],
"metrics": [
{{we have 21 metrics}}
],
"elements": [
{{we have 3 elements}}
]
}
}

2) get the report id by this request(method):

  https://api.omniture.com/admin/1.4/rest/?method=Report.Queue

3) get the report by trying to get the status we waiting 2 hours:

https://api.omniture.com/admin/1.4/rest/?method=Report.Get

after 2 hours we still get report not ready.

how many requests together we can send? or how many Concurrent requests can we send?

thanks 

Raneen Bsais