Error Value: 2147942523 on Scheduled Task for Powershell

Situation: 
One of our clients where struggling with SSRS2008 R2 in SharePoint 2010 integrated mode (two server farm, both 64-bit Windows 2008 R2).
It is well known that this version SSRS 2008 R2 (v10) delivers a really bad performing webpart on the first report that is requested at the beginning of the day. For your information: The older v9 version performs much better as well as the newer version (of SSRS 2012).
However, I tried several solutions, without any luck. I found a solution on Pavel Pawlowski's blog (http://www.pawlowski.cz/2011/07/solving-issue-long-starting-report-ssrs-2008), which suggest to run a powershell script to stop/start the SSRS service, and load a report in a webclient (read more details on his post).
Problem:
I tried to run the scheduled task with the following statement:

"powershell.exe -noprofile -executionpolicy RemoteSigned -file c:\dnm\RestartSSRS.ps1"

It didn't work, it shows the following errors:
Task category: Action failed to start

Description: Task Scheduler failed to launch action “powershell.exe -noprofile -executionpolicy RemoteSigned -file c:\dnm\RestartSSRS.ps1? in instance “{46caf0b2-50df-49ad-90d6-0f4f9fd203ae}” of task “\SSRS Recycle”. Additional Data: Error Value: 2147942523.
Then I get:
Task category: Action start failed
Description: Task Scheduler failed to start instance “{46caf0b2-50df-49ad-90d6-0f4f9fd203ae}” of “\SSRS Recycle” task for user “customerdomain\Administrator” . Additional Data: Error Value: 2147942523

Solution:
I turns out that in this situation the Task Scheduler cannot fire the 64-bit version of powershell (which powershell.exe will do). You need to explicit point to the 32-bit version.
What I did was, edit the scheduled task, go to the action-tab and open the edit action window of the action.
On 'Program/script', I entered: C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
On 'Add arguments (optional), I entered: -noprofile -executionpolicy RemoteSigned -file c:\myScripts\RestartSSRS.ps1

Done, that solved the "Error Value: 2147942523" problem for me.
And the solution Pavel Pawlowski gave, works also! All credits to him!

Report Server: Show/hide textbox by an expression

Today I was struggling with hiding a textbox on a report (in Report Builder) by using an expression. I tried to evaluate the number of subfunctions of a certain person. The evaluation worked, but the textbox didn't show up when 1 or more subfunctions were available.
The expression was:

=IIf((Count(Fields!Uid.Value, "dsSubFunctions")<1),False,True)

WRONG! The property you will set is named 'Hidden', so it's just the other way around:

=IIf((Count(Fields!Uid.Value, "dsSubFunctions")<1),True,False)

And stupid of me, it is just written right above the expression-textbox: 'Set the expression for: Hidden'

Anyway, just thought to share it, in case there are some more (lazy) programmers who don't read every single line of text Microsoft shows you :)