I guess it might have to with your F1 visa...maybe you should sent it again without the form....or ask a lawyer who knows the best. Good Luck!
Foreign Students:
The eligibility code for an F-1 student seeking optional practical training (OPT) has been changed.
The eligibility code (c)(3)(i) will no longer be used and has been replaced with the following three codes: (c)(3)(A) for pre-completion OPT, (c)(3)(B) for post-completion OPT, and (c)(3)(C) for a 17-month extension for an F-1 student who has received a degree in Science, Technology, Engineering, or Mathematics (STEM), that appears on the STEM designated Degree Program List published on the SEVP website available through the Related Links on this page.
If you are a STEM student requesting 17-month extension of your currently authorized optional practical training, you must also submit a copy of your degree reflecting the conferred degree as well as your major field of study. In addition, the employer with whom you are seeking the 17-month OPT extension must be registered in E-Verify. Accordingly, you must list the employer's E-Verify Company Identification Number or a valid E-Verify Client Company Identification Number in Item 17 of the Form I-765. Please refer to the section on Foreign Students in the form instructions.
The eligibility codes (c)(3)(ii) and (c)(3)(iii) are unchanged and remain in use.
Electronic Filing:
Please note that the option to file Form I-765 electronically for the eligibility category (c)(3)(i) has been disabled. The option to file Form I-765 electronically for the new eligibility categories (c)(3)(A), (c)(3)(B), and (c)(3)(C) is currently not available but will be available shortly. When this option becomes available, an update will be posted to this page. The option to file the Form I-765 for the eligibility codes (c)(3)(ii) and (c)(3)(iii) remains in effect.
http://www.uscis.gov/portal/site/us...toid=73ddd59cb7a5d010VgnVCM10000048f3d6a1RCRD