Cant get a good 3d print

[EmualDave]

Hi there,

I have bough Precision Reprap Prusa i3 printer a year ago (almost) from this supplier http://www.aliexpress.com/item/7-Mat...08.0.55.Q7oumt

I have assembled the printer with no major issues, all axis works fine (tested with pronterface). its worth mentioning that I was not able to install the piece used to direct the air to the nozzle head, it arrived defective (melted some how).

for the heat bed, I am using the one came in the package which is 0.5mm aluminum, and I am using a glue stick UHU to make the print stick to the service of the heatbed.

I have aligned the printer head using the paper sheet method, the printer doesn't have auto-leveling board.

after 2 weeks of trying to print the 2mm cube, I got bad prints as shown in the attached file. (this is the best result so far)

image hosting over 5mb

Printing setting:
Nozzle diameter: 0.4
Retraction length 3mm
Retraction Speed: 30mm
Temp. Extrude : 230 (as suggested by MakerGeek, I am using their 1.75 PLA)
Temp. Heat Bed: 65
Filament Diameter: 1.75mm
Filament Extrusion multiplier: 1.01
Infill density: 50%
Fill pattern: Rectilinear
Layer Height: 0.2mm
First layer height: 0.35mm
First layer speed: 30mm/s
Travel speed: 100mm/s
Speed Perimeters: 20mm/s
Small Perimeters: 15mm/s
External Perimeters 50% mm/s
Infill: 50mm/s
Solid infill: 20mm/s
Bridges : 60mm/s

Can anybody help me with what to do?
What I am doing wrong?

The printer head is calibrated from all corners using the paper sheet method.

Thanks and Best Regards