lose access to FSA when recalling EV files

seems we have stopped the lose of shares by applying  Changing SMB2 MaxThreadsPerQueue setting to 64 on all FSA

MaxThreadsPerQueue (HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters\(REG_DWORD)

However we are still getting large recalls even by just higlight jpeg files ..

during a Dtrace on the highlighed Jpegs shows

4891        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:M       [EvPassthruCacheInit] Queueing a data request| FileName:D:\UK\Pro\11030854 Felpham Bognor\Photos\site visit\B.N.N.R.Felpham August 2010\Picture 024.jpg| keyID : 31

4892        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:L         {PassThroughRecallLimiter::PassThroughRecallLimiter} (Entry)

4893        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:L         PassThroughRecallLimiter::PassThroughRecallLimiter Caller SID is S-1-5-21-1111383825-1399753330-1979989523-17310

4894        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:M       WorkItem::GetExeName: Trying to get the .exe name for pid: 3796

4895        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:M       WorkItem::GetExeNameUsingPHHelper: entry - PID:3796

4896        16:36:58.841           [2872]    (EvPlaceholderService)          <3380>    EV:M       WorkItem::GetExeNameUsingPHHelper: exit - PID:3796, exe name:mcshield.exe

4897        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:M       WorkItem::GetExeName: The .exe name for for pid: 3796 is mcshield.exe

4898        16:36:58.841           [2872]    (EvPlaceholderService)           <3380>    EV:L         {PassThroughRecallLimiter::PassThroughRecallLimiter} (Exit) Status: [Success]

I have the mcshield.exe in the exculded exe registry on both the placeholder and passthrough entries as we use passthrough recall