Button click is not firing under in grid view

Question

I have a crm in which under grid view button clieck event is not firing in asp.net c#.

please help me. its very urgent.

 

when  click on button getting error

 

Uncaught Sys.ArgumentNullException: Sys.ArgumentNullException: Value cannot be null.

Parameter name: array

at Function.Error$create [as create] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:847:15)

at Object.Sys._errorArgument (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:821:21)

at Function.Error$argumentNull [as argumentNull] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:883:16)

at Function$_validateParameterType [as _validateParameterType] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:753:36)

at Function$_validateParameter [as _validateParameter] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:719:18)

at Function$_validateParams [as _validateParams] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:668:22)

at Function.Array$indexOf [as indexOf] (http://localhost:6323/ScriptResource.axd?d=ywIIugyCMc5ZBXTMWz1cgNW-pSOR3bmFgdlnb2SG7ETj3WfoRNG6hSC5OMghrokqDxMmpcLdDGgB6GwOYFWxDoon-3KLwq2KgtjwQp3DUWQ0skWuwu4QaWVb8N2ae8fZeF_gy0Gxn95IJr6kCRj2IQ2&t=23c9c237:1940:22)

at PageRequestManager$_getPageLoadedEventArgs [as _getPageLoadedEventArgs] (http://localhost:6323/ScriptResource.axd?d=Ix5gOM811iy1g4bJlvSIiTZ22DDVLp2dTEw8O2voV0Hp7CF_SBkJRlJXOeOv2cp-tuE_YML7CI4-JzWxojyV919taCZgDUsAI9pPvLvc8LJ25JgBDWOCS0BJ2UG9C3-lqACCqtrBp-Mnvne56HVN8g2&t=23c9c237:1039:38)

at PageRequestManager$_pageLoaded [as _pageLoaded] (http://localhost:6323/ScriptResource.axd?d=Ix5gOM811iy1g4bJlvSIiTZ22DDVLp2dTEw8O2voV0Hp7CF_SBkJRlJXOeOv2cp-tuE_YML7CI4-JzWxojyV919taCZgDUsAI9pPvLvc8LJ25JgBDWOCS0BJ2UG9C3-lqACCqtrBp-Mnvne56HVN8g2&t=23c9c237:1490:58)

at PageRequestManager$_scriptsLoadComplete [as _scriptsLoadComplete] (http://localhost:6323/ScriptResource.axd?d=Ix5gOM811iy1g4bJlvSIiTZ22DDVLp2dTEw8O2voV0Hp7CF_SBkJRlJXOeOv2cp-tuE_YML7CI4-JzWxojyV919taCZgDUsAI9pPvLvc8LJ25JgBDWOCS0BJ2UG9C3-lqACCqtrBp-Mnvne56HVN8g2&t=23c9c237:1896:14)