Rectangular to Polar Conversion

My old HP calculator finally died after 25 years of service and I have bought an HP35s as a replacement. The seemingly straightforward operation of converting rectangular to polar is not working:
8.66 [i] 5 [Enter] simply returns 8.66i5.00 in the display
The opposite function (polar to rectangular works fine:
10 [theta] 30 [Enter] correctly returns 8.66i5.00
What's up with the R/P???? What am I missing???? Can anyone please offer the soulution. I need to get back to work. Thank you.

Hi,
There sadly is no R<->P keytop function on the HP-35s.
However, it can be achieved in different ways:
In your example you are using the complex number format, you need to change display modes to rQa ( R theta A, orange shift, Display (left arrow) item 10 ). Of course now all complex numbers are in polar format and you need to change the display setting back to rectangular format for rectangular co-ordinates.
Another solution is to use a program to convert between rectangular and polar form, e.g.:
http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=983
or
http://www.geocalc.com.au/uploaded/HP35S%20Rectangular%20Polar%20Conversions.pdf
Best regards.
(edited to correct some grammar)
Note: I do not work for HP, I just like playing with calculators :-)

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<ErrorCode>-61160</ErrorCode>
<DynamicText><TreeLineInfo><LineInfo><DiagramObject><VIPath>C:\NIFPGA2009\clntTmp\FPGAImagi~2C_FPGATarg~A7_2Tap8bit~6A_nagEfsCz~08\MungedForFPGA\NI.Munge.2 Tap 8 bit RT Image Processing Initial.vi_FPGACompileCopy00000001.vi</VIPath>
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<ErrorCode>-61101</ErrorCode>
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Hello! First of all, can I get the following information from you?
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Attachments to email-replies don’t work, please use the camera-symbol in the browser.
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