Hlw sir if our company cannot give our salary...

If the employer refuses to pay the worker’s salary for the period of his work, the worker may file a complaint at the Ministry of Human Resources and Emiratisation against the employer, as it is the body responsible for receiving labor complaints.
Here is the text of the UAE Labor Law related to your inquiry:
Article 37:
A worker may be employed on probation for a period not exceeding six months, during which the employer without notice or severance pay may terminate his services. A worker shall not be placed on probation more than once with the same employer. Where a worker successfully completes the period of probation and continues in employment, the said period shall be calculated as part of his period of service.