Work flow failed to start

Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; .NET CLR 3.0.04506.30; .NET4.0C; .NET4.0E)

Timestamp: Fri, 11 Oct 2013 06:31:16 UTC

Message: Sys.WebForms.PageRequestManagerServerErrorException: Exception from HRESULT: 0x8102009B

Line: 5

Char: 62099

Code: 0

URI: http://wabco-sp/ScriptResource.axd?d=nkwiFEfHRiYN9_VW2qDHsRiAR3spoWSswEQiXD7Va4w-EzYusDq5o8O-Xs_WH8icapqZNjqGcJOdFO4qfG72Z1aFuR131yrNxIJryOrQD1eh_8O0fP2RzRDEQ4zz71DN02RVrnPFtBfZX8t9NdriG8zSCV01&t=ffffffff8dc250fc